import React, { Component } from 'react'
// // 引入store，用于获取redux中的状态
// import store from '../../redux/store'
// // 引入actionCreators，用于创建action对象
// import {createIncrementAction, 
//         createDecrementAction, 
//         createIncrementAsyncAction} from '../../redux/count_action'


export default class Count extends Component {
  // state = {count: 0}

  // componentDidMount(){
  //   // 检测redux中状态的变化,只要变化,就调用render
  //   store.subscribe(() => {
  //     this.setState({})
  //   })
  // }
  //加法
  increment = () => {
    const {value} = this.selectNumber
    this.props.jia(value*1)
    // store.dispatch(createIncrementAction(value*1))
  }
  // 减法
  decrement = () => {
    const {value} = this.selectNumber
    this.props.jian(value*1)
    // store.dispatch(createDecrementAction(value*1))
  }
  // 奇数加
  incrementIfOdd = () => {
    const {value} = this.selectNumber
    if(this.props.count % 2 !== 0){
      this.props.jia(value*1)
    }
  }
  // 异步加
  incrementAsync = () => {
    const {value} = this.selectNumber
    this.props.jiaAsync(value*1, 500)
    // store.dispatch(createIncrementAsyncAction(value*1, 500))
  }
  render() {
    return (
      <div>
        <h1>当前求和为：{this.props.count}</h1>
        <select ref={c => this.selectNumber = c}>
          <option value="1">1</option>
          <option value="2">2</option>
          <option value="3">3</option>
        </select>&nbsp;
        <button onClick={this.increment}>+</button>&nbsp;
        <button onClick={this.decrement}>-</button>&nbsp;
        <button onClick={this.incrementIfOdd}>当前求和为奇数再加</button>&nbsp;
        <button onClick={this.incrementAsync}>异步加</button>
      </div>
    )
  }
}
